White-lead cooler



(No Model.) 2 Sheets-Sheet 1. F. EGKSTEIN, Jr.

' WHITE LEAD 000mm.

5" 5 IIIIIIIIIIH! m haw 2 Sheets-Sheet 2.

(No Model.)

1?. ECKSTE IN, Jr.

WHITE LEAD COOLER.

No. 340,772. Patented Apr. 27, 1886.

INVENTIIIR ATTEET N. PETERS. Photo-Lithographer, Washmgflm. D. c.

i i t UNITED STATES PATENT OFFICE.

FRED EoxsTEIN, JE, OF CINCINNATI, OHIO.

WHITE-LEAD COOLER.

l'iPIEiCIFICATION forming part of Letters Patent No. 340,772, dated April 2'7, 188G.

Application filed January '7, 1885. Serial No. 152,229. (No model.)

To all whom, it may concern.-

Be it known that I, FRED EOKSTEIN, J r., a citizen of the United States, residing at Oinoinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in WVhite Lead Coolers, of which the following is a specification.

White lead as it comes from the mill or stones is a pasty or semi-liquid mass, owing to the grinding having been conducted in water to prevent the giving off of poisonous dust. In order to expel this water, the material is dried by submission to a high heat, and must then be cooled before it can be put up for commerce. This cooling has heretofore been accomplished by exposing the comminuted lead in broad thin sheets to the air at its ordinary temperature, and occasionally stirring it by hand, and has therefore been a laborious and time-consuming operation. Another method, and at present practiced, has been to feed the material slowly along a metal trough by means of an Archimedean screw revolving therein, while a stream of cool water flowing in the opposite direction was kept in contact with the exterior of said trough by means of a jacket. The stirring in this arrangement is not sufficiently thorough to expose every particle to the refrigerating action of the water-jacket, and consequently the material usually comes out with portions still in a heated condition. The apparatus also takes up a great deal of valuable space, is inconvenient, from the necessary length of the trough, and an obstruction to persons passing from one part of the factory to the other. In my present invention I obviate these objections by employing a flat-bottomed cylindrical cooling-pan supported upon a coldwater jacket, and combining with said pan a rotary head, which carries gangs of stirrer-s traveling in succession in such paths as to sweep the entire surface thereof,

' and gradually edging the white lead as it is stirred and cooled out toward the periphery of the pan, where it is at last discharged through a spout into a suitable conductor, all as will presently appear.

In the drawings, Figure 1 is an elevation in section of a machine embodying my invention; Fig.2, a top plan view thereof with the hopper or feed-spout removed; Fig. 3, a detail of the construction of said feed-spout; and Figs. 4. and

5, enlarged details, in side and edge elevation, of the specific form of stirrer-s which I have chosen as the most preferable to me at present known for the purpose of illustrating the principle of said invention.

A represents a strong frame of any suitable construction to sustain the mechanism. Upon the upper cross-beams, A, of this frame rests the circular jacket B, of copper or other appropriate metal. This jacket has a central hub, b, rising within it to a height slightly above the possible level of the water with which it is intended to be filled, and in order to secure a constant circulation of such water or refrigerating-liquid its floor is divided by a number of low flanges, b, reaching alternately from one side nearly to the opposite. An induction-tube, b enters the jacket opposite the starting-point of the first flange, and advisably about midway of its height, and a discharge-tube, b", leads therefrom opposite the last flange, but near the top of thejacket, the reason of which arrangement will directly appear.

The cooling-pan G is,likethejacket in which it is to sit, of circular form, with flat bottom and a perimetric flange, c, at the top of its vertical walls. Its extreme diameter is somewhat less than the internal diameter of the jacket, so that when placed therein there may be a water'space between the sides of the two, and its depth is such that its bottom will sit upon the transverse flanges of said jacket, while its perimetric flange rests upon, and of course is hermetically secured to, the upper edge or rim of the jaoket-walls. At the center the pan is struck up or re-enteringly cupped to form a hood, 0, which sits over and embraces the upper end of the hub from the j aoket, yet so as to leave an annular water-space between hood and hub, opening from the larger space below. At one side, close to the periphery, a spout, D, leads from the pan through the bottom of the jacket, to convey the cooled material into kegs or receptacles beneath, and a cut-off slide, d, at the discharge end of this spout enables the attendant at any time to substitute an empty keg for the one already filled.

Through the jacket-hub and a corresponding bore in the top of the inclosing-hood rises a spindle, E, supported beneath in a step, c, and immediately above said hub and hood,

which steady its upper end, receiving the cross-head F, provided with arms or wings F, one or more. These arms are provided with gangs of stirrers G, which depend into close proximity or contact with the bottom of the pan, and, as the spindle and crosshead rotate, continually lift and turn over the pulverized material, lightening it for the better contact of the refrigerating-air, and bringing every particle in succession in contact with the cold plate beneath.

\Vhile the stirrers may assume various forms or individualities, and may even be given an independent rotation by suitable trains of gearing operated .by the rotation of their supporting arm or arms to increase their effective action, I have found the simplest, and so far the most efficient, to be substantially as represented in the drawings. Therein they are shaped and operate substantially like shares, the respective stirrers being formed of plates g, set obliquely to the line of movement, and curved in such manner that they raise the material in the pan as they plow along, and turn it as a furrow-slice is turned. They are attached to their carryingarms by screw-threaded stocks 9 and clamping-nuts 9 or other convenientmeans by which they can be adjusted in height, and also angularly to their path, and this angle is such that the inmost turns its furrow toward the outer, and the nextfollowing repeats this turn, until finally the material is swept into the discharge-spout. The cross-head may have but a single arm and single gang of stirrers'set so near together that each stirrer turns its furrow into the path of the next, so as to be turned thereby on the succeeding round. It is better, however, to have two arms diametrically opposite each other, or three or more equidistant arms, each with its gang, the stirrers of one gang overlapping the stirrers of the preceding gang, as shown in Figs. 1 and 3, so that the entire mass of pulverized lead may be shaken up and overturned repeatedly and at short intervals. The spindle carries upon its head and fast thereto a feed-spout, H, having one or more short discharge-chutes, h, which are fed from a hopper or other delivery above, and distribute the material evenly at the center of the pan around the hood as the spindle turns.

For the purpose of driving the apparatus, the spindle is fitted near its foot with a bevelwheel, I, engaging with a pinion, I, on ahorizontal shaft ultimately actuated by a suitable prime motor. However, spur or chain gearing or belting may be substituted for the bevelgearing, the only requirement being that the spindle shall be turned in the proper direction and at a speed so graduated that the lead in the pan shall be properly cooled before it is carried to the discharge-spout.

Instead of arranging the spindle to project up from beneath, passing through the jacket and pan, it is evident that it may depend from overhead, at some sacrifice, however, of convenience and compactness of build,

To recapitulate: The machine being constructed as described, a stream of cold water under some considerable head is let into the jacket through the induction-tube, and flows between the transverse partitions and rises in the space between said jacket and the pan until it reaches the discharge-aperture, when it flows out. The current thus established is kept up so long as the apparatus is in action. The spindle is now started, and heated white lead fed into the pan from the overhead chutes, and gradually turned and distributed outward by the stirrers, until finally, in a perfectly cool state, it is swept into the discharge-spout, from which it descends to a keg or other recepiacle, as explained.

It is evident that by the substitution of steam or hot water for the cold-water current the apparatus may be used for drying or roasting, and therefore in covering its variouscombinations I do not propose to limit myself to its use as a cooler alone.

I claim 1. An apparatus for cooling white lead and analogous purposes, consisting of a pan or receptacle having a hollow space beneath its bottom and behind its walls connected together to form a single chamber, and an inlet and an outlet aperture and connections for passage and circulation of a cooling medium, as water, a rotating shaft set upright in said receptacle and provided with a scraping device, the edges of which are set to run against the surfaces of the said receptacle, and mechanism, substantially as specified, for imparting rotation to said shaft, as set forth.

2. A white-lead cooler having flat bottom and perpendicular sides, with a hollow space or chamber surrounding the bottom and sides of said cooler to contain a cooling medium, as water, an inlet and an outlet in the said space or chamber, with connections having cocks to control the flow of the cooling medium, and a scraping device on which are scraping-edges set to work against the interior surfaces of the receptacle, and mechanism for imparting motion to said scraping device, substantially as herein specified, to operate as set forth.

3. The combination, substantially as hereinbefore set forth, of the circular pan and the spout leading therefrom near .its periphery, the jacket beneath said pan having a series of flanges reaching alternately from one side to near the other, upon which the bottom of the pan rests, the induction and discharge tubes connecting with the chamber thus formed, the spout leading from the pan through the jacket near the outer edge of the former, the spindle, and the stirrers carried by said spindle, and arranged to travel upon the bottom of the pan and gradually edge the material toward the spout. H

4. The combination, substantially as hereinbefore set forth, of the stirring-pan, a revolving spindle axial of said pan, an arm carried by said spindle and reaching over the pan toward its periphery, and a series of share- IIO shaped stirrers depending from said arm to sweep the floor of the pan, and so arranged that each inner one in succession turns its furrow toward the next outer.

5. The combination, substantially as hereinbefore set forth, of the stirring-pan, its jacket with induction and eduction tubes, the spindle arranged in the axial line of said pan and jacket, an arm or wing borne by said spindle and reaching toward the side of the pan, and a series of share-shaped stirrers depending from said arm, and arranged to throw their furrows from the center toward the circumference.

6. The combination, substantially as hereinbefore set forth, of the jacketed stirringpan, the spindle, two or more arms borne by said spindle and reaching toward the sides of the pan, and the gangs of share-shaped stirrers carried by said arms, the stirrers of one gang being arranged to overlap the stirrers of the gang in advance.

7. The combination, substantially as hereinbefore set forth, of the jacketed stirringpan, the spindle arranged axially of said pan, the

stirrers carried by said spindle, and the feed chute or chutes borne upon the head of said spindle and revolving therewith to distribute the material evenly at the center of the pan.

8. The share shaped stirrer formed substantially as shown or described, and having a stock whereby it may be attached to its supporting-arn1.

9. The combination, substantially as hereinbefore set forth, of the stirring-pan, the spindle, the arm or arms carried thereby, the gang or gangs of share-shaped stirrers depending from said arm or arms, and means by which each may be adjusted with respect to its angle with its respective carrying-arm. V

10. The combination, substantially as hereinbefore set forth, with the share-shaped stirrers and the arms by which they are supported, of the screw-threaded stocks integral with said stirrers, and the clamping-nuts whereby they are adj ustab] y connected with the arms.

FRED ECKSTEIN, J R.

WVitnesses:

FRANK W. BURNHAM, LEONARD VASSALL. 

